My fuel economy seems to have been really bad this week. For the last two years my average has been 41.7 mog. The average suddenly dropped to the mid-30ss, with point mpg readings about 50% of what I usually get it seems to me. I've been thinking that this is the mystical DPF regen happening, which I have never really noticed before and it certainly hasn't had this much of an effect on economy before. I drive around an hour each way, half and half slow traffic and 50-70 mph. If regen only happens above 2k rpm then I figure it's still been going for at least three hours so far.
I think I'll check tyre pressures then go boot the nuts off it for a while, but I'm interested in the thoughts of you guys on it. Initially I thought it was a stuck calliper as I got a whiff of heat at one point after parking, but there's no grinding, lack of roll, or dip in performance.